147_Dynamics 11ed Manual

147_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 13 Problem 13-1 Determine the gravitational attraction between two spheres which are just touching each other. Each sphere has a mass M and radius r . Given: r 200 mm = M 10 kg = G 66.73 10 12 × m 3 kg s 2 = nN 1 10 9 × N = Solution: F GM 2 2 r () 2 = F 41.7 nN = Problem 13-2 By using an inclined plane to retard the motion of a falling object, and thus make the observations more accurate, Galileo was able to determine experimentally that the distance through which an object moves in free fall is proportional to the square of the time for travel. Show that this is the
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